Method for determining an ophthalmic lens

US8007102B2 · kind B2 · utility

Assignee

• Essilor International (Compagnie Generale d'Optique) · FR

Inventors

• Diane De Gaudemaris · Paris, FR
• Cyril Guilloux · Charenton-le-Pont, FR
• Fabien Muradore · Charenton-le-Pont, FR

Key dates

• Filing date: Sep 25, 2007
• Grant date: Aug 30, 2011
• Expiry date: Nov 21, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F30/20
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method for determining an ophthalmic lens includes choosing an initial lens with a first face and a second face and defining an initial surface for the second face of the lens with a central zone of diameter Dini and a peripheral zone of inner diameter Drac greater than the diameter Dini of the central zone, each point of the central zone and the peripheral zone having an altitude defined with respect to an axis (Z) normal to the second face of the lens and having the centre of the central zone as its origin, the altitude of the peripheral zone being defined as the minimum of the points situated on the diameter Drac; the peripheral zone having a maximum radius of curvature comprised between the maximum radius of curvature of the first face and the maximum radius of curvature of the central zone.